Gas-heater.



WITNESSES G. J. RHODIN.

GAS HEATER.

APPLICATION FILED NOV. 25, 1912.

Patented Dec.23,1913.

INVENTOR $2 ATTORNEY 5 TTNTTE CARL J. BHODIN, OF SAN FRANCISCO, GALITEOR-NIA.

GAS-HEATER.

To all whom it may concern Be it known that I, CARL J. RrroorN, a citizen of the United States, and a resident of the city and county of San Francisco and State of California, have invented certain new and useful Improvements in Gaslleaters, of which the following is a specification.

The invention relates to gas burning heaters which are adapted to be used to heat a house, room or other compartment.

The object of the invention is to provide a heater which will radiate substantially all of the heat produced by the combustion of the gas.

Another object of the invention is to provide a heater through which the heated gases circulate slowly, thereby providing a substantially constant temperature at all points.

The invention possesses other advantageous features, which, with the foregoing, will be set forth at length in the following description where I shall outline in full that embodiment of the invention which I have elected for illustration in the accompanying drawing, which is a vertical section taken through the heater.

The heater consists of a closed shell or cas ing 2 of any desired shape and preferably formed of sheet metal, Arranged on the casing 2 intermediate the top and bottom is an outlet pipe 3, preferably placed adjacent the bottom, through which the gases of combustion pass to a flue or chimney. Arranged in the outlet pipe is a damper 4- for regulating the draft.

l Vithin the casing and preferably secured thereto by the clips 5 is a combustion chamher 6 preferably formed of sheet metal and open at the top and bottom. This combustion chamber is preferably wide at the bottom and is narrowed at its upper portion which terminates below the top of the cas ing 2, thereby providing a large annular space between the chamber 6 and the casing through which the hot gases pass slowly downward.

At the bottom of the heater is arranged a gas burner 7 of the Bunsen type, which preferably lies above the lower edge of the combustion chamber 6. This burner is provided with the customary inlet 8 through which the mixture of gas and air is introduced. A connection 9 for a hose or flexible gas conductor is provided at the gas inlet. Gas requires a certain amount of air to be mixed Specification of Letters Patent.

Application filed November 25, 1912.

Patented Dec. 23, 15913.

Serial No. 733,286.

therewith in order to obtain the maximum heat value thereof at combustion and a greater or less amount of air reduces the heatin eiiiciency of the flame.

The casing 2 is provided adjacent the base with an opening Ll to which is applied a tubular section the outer open end of which is closed by a substantially air tight door 12, and the door is provided with any suitable regulatin device which will hold the door open to any desired degree, in a well known manner. The combustion chamber 6 is pro vided with an opening 13 in line with the opening 14;. Through these openings the proper amount of air is admitted, in addition to that which enters at the inlet 8, to completely support combustion, only, such amount of air being under control. The primary purpose of admitting air through the openings 13 and i l is to prevent the gas from igniting within the burner, and burning therein. Tn addition to the function above described. the opening 13 assists in creating an internal circulation of gases through the entire heater. The proper amount of air is introduced with the gas and through the openings 13 and 14. so that the heat of the flame is not employed for heating any excess air.

The gases of combustion pass up through the flue (i and are deflected downwardly by the top of the casing 2 between the due and the casing 2, a portion of said gases passing downward, substantially to the bottom of the casing, and up within the combustion chamber to form an internal circulation, and said gases are finally discharged through the outlet which is preferably ar ranged a short distance above the plane of the burner. The area of the casing 2 is proportioned to the size of the burner so that the gases will travel downward slowly and transfer substantially all of their heat to the casing before they enter the outlet and the casing is of such area that the heat thereof is readily "adiated into the room. Since only suiiicient air to produce the maximum heat at combustion is introduced into the heater, the volume of gases passing through the outlet is small, and the amount of heat carried thereby is correspondingly small.

By the use of the heater of my invention, the gases of combustion only are present within the heater and these gases travel slowly in a circuitous path through the heater on account of the combustion chamber 6 and the relatively large interior spaces, and discharge their heat before they, reach the outlet. The gases of combustion are discharged from the room or chamber so that the air therein is not fouled and all of the heat values of the gas are obtained.

1 claim:

1. In a gas heater, the combination of a closed casing having an outlet therefrom, a Bunsen burner arranged adjacent the bottom of the casing, an air inlet in said casing located in a plane above the burner and provided with air regulating means, a combus- J tion chamber inclosing the burner having open ends and located in the casing with its bottom and sides spaced from the casing, said chamber having an air opening communicating with the air inlet in the casing and having its discharge end above the casing outlet, whereby there may be a circulation of gases upward through the combustion chamber and downward between the combustion chamber and casing substantially to the bot-- tom of the casing in addition to a circulation of a portion of the gases directly to the casing outlet.

2. In a gas heater, the combination of a closed casing having an outlet therefrom, a Bunsen burner arranged adjacent the bottom of the casing, an air inlet in said casing provided with air regulating means, a combustion chamber in the casing having open ends and comprising an enlarged lower portion surrounding the burner and provided with an air inlet registering with the air opening in the casing, said chamber being spaced at both ends and at its sides from the casing and discharging above the casing outlet, whereby an upward circulation of gases is caused through the combustion chamber and downward between said chamber and the casing substantially to the bottom of the casing in addition to a circulation of a portion of the gases directly to the casing outlet.

In testimony whereof, I have hereunto set my hand at San Francisco, California, this 18th day of November, 1912.

CARL J. RH ODIN.

In presence of H. G. Pnosr, M. LECONTE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

